Class: BitmapCompiler::Core::Bitmap

Inherits:
Object
  • Object
show all
Defined in:
lib/bitmap_compiler/core/bitmap.rb

Overview

Bitmap entity

Constant Summary collapse

MIN_WIDTH = 
MIN_HEIGHT = 1
MAX_WIDTH = 
MAX_HEIGHT = 250
STANDARD_COLOR = 
'O'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width, height, cells: nil) ⇒ Bitmap

Returns a new instance of Bitmap.



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 11

def initialize(width, height, cells: nil)
  @height = Integer(height)
  @width = Integer(width)
  @cells = cells

  clear if cells.nil?
end

Instance Attribute Details

#cells ⇒ Object (readonly)

Returns the value of attribute cells.



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 9

def cells
  @cells
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 9

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 9

def width
  @width
end

Instance Method Details

#change_pixel(row, column, color) ⇒ Object 



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 19

def change_pixel(row, column, color)
  return false unless valid_coordinate?(row, column)

  cells[row - 1][column - 1] = color
end

#clear ⇒ Object 



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 25

def clear
  @cells = initialize_matrix
end

#initialize_matrix ⇒ Object 



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 29

def initialize_matrix
  Array.new(width) { Array.new(height) { STANDARD_COLOR } }
end

#print ⇒ Object 



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# File 'lib/bitmap_compiler/core/bitmap.rb', line 33

def print
  ''.tap do |output|
    (0..cells[0].length - 1).each do |column_index|
      (0..cells.length - 1).each do |row_index|
        output << cells[row_index][column_index]
      end

      output << "\n"
    end
  end
end

#valid_column_index?(column) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitmap_compiler/core/bitmap.rb', line 59

def valid_column_index?(column)
  column.between?(1, height)
end

#valid_coordinate?(row, column) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitmap_compiler/core/bitmap.rb', line 55

def valid_coordinate?(row, column)
  valid_row_index?(row) && valid_column_index?(column)
end

#valid_horizontal_line_coordinates?(column, start_row, end_row) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitmap_compiler/core/bitmap.rb', line 50

def valid_horizontal_line_coordinates?(column, start_row, end_row)
  valid_row_index?(end_row) && valid_row_index?(start_row) &&
    valid_column_index?(column) && start_row <= end_row
end

#valid_row_index?(row) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitmap_compiler/core/bitmap.rb', line 63

def valid_row_index?(row)
  row.between?(1, width)
end

#valid_vertical_line_coordinates?(row, start_column, end_column) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bitmap_compiler/core/bitmap.rb', line 45

def valid_vertical_line_coordinates?(row, start_column, end_column)
  valid_row_index?(row) && valid_column_index?(start_column) &&
    valid_column_index?(end_column) && start_column <= end_column
end